The forward made six appearances for the Dale after joining on loan in November with the 21-year-old notching two goals for Keith Hill's side.
A product of Barnsley's Academy, Reuben made history in September 2008 when he featured as the Club's and Football League's youngest ever player at the age of 15 years and 45 days at Ipswich Town.
Thirty-eight of his 49 Reds appearances were from the bench, with his three goals all memorable strikes against Millwall, Leicester and Reading.
Barnsley Football Club would like to thank Reuben for his work at Oakwell and wish him the very best in his future career.
